EP2701646A1

EP2701646A1 - Wound care article having a pattern of incisions and/or punchings

Info

Publication number: EP2701646A1
Application number: EP12718955.3A
Authority: EP
Inventors: Birgit Riesinger
Original assignee: Individual
Current assignee: Riesinger Birgit
Priority date: 2011-04-26
Filing date: 2012-04-26
Publication date: 2014-03-05
Also published as: DE102011002268A1; US20140135721A1; WO2012146656A1

Abstract

The invention relates to a wound care article, comprising a planar absorption body made of a nonwoven material or air-laid material containing superabsorbent polymers, wherein said planar absorption body has a pattern of incisions and/or punchings.

Description

Wound care article with a pattern of incisions and / or punches

The present invention relates to a wound care article with a pattern of incisions and / or punches according to the preamble of claim 1. The prior art, for example from DE10059439 of the applicant of the present application, discloses wound care articles having a wound exudate absorbing body. In this case, the latter has a substantially flat Materialabschniit of absorbent material, consisting of an absorbent fleece with distributed therein superabsorbent Tei Ichen.

The absorption body described therein has a multilayer structure, wherein the layers are connected in a planar manner by so-called "bonding points." The bonding points are produced by thermal pressing with a stamp-like matrix. A wound care article produced with such bonding points has a certain rigidity over its surface and is not ^* flexible In addition, in certain circumstances, the cavities produced by the bonding process have welded surfaces on their walls, since the bonding process uses, among other things, heat, which can seal the areas in question and cause the liquid to seep in make the absorption material difficult, which in turn affects the overall fluid intake. There are other approaches that work without said bonding points. However, the products produced by these processes also have a certain rigidity and may also tend to make it more difficult to enter the absorbent material,

SUMMARY OF THE INVENTION

Object of the present invention is to provide a wound care article that does not have the disadvantages mentioned. This object is achieved by the features of the present set of claims. The dependent claims give preferred

Embodiments on. It should be noted that the specified area information is to be understood throughout including the respective limit values.

DETAILED DESCRIPTION OF THE INVENTION

According to the invention, therefore, a wound care article comprising a flat

Absorbent body of a non-woven or airlaid material containing superabsorbent polymers provided which has a pattern of incisions and / or punches.

The term "nonwoven" refers to a textile fabric of individual fibers which, unlike woven fabrics, knitted fabrics and knitted fabrics, is not made of yarns Nonwovens tend to retain their structural integrity as a result of the adhesion of the individual fibers and are referred to as "nonwovens". and eg made by swaging the fibers. The term "A aid" refers to a special nonwoven fabric made of cellulose and polyolefin fibers, in which superabsorbent polymers may be embedded.

Preferably, it is further provided that the wound care article at least partially contains superabsorbent polymers. Superabsorbent polymers (SAP) are plastics that are capable of multiples of their own weight - up to 1000 times - on

Absorb liquids. Chemically, this is a copolymer of acrylic acid (P opensäure, C3K1O2) and sodium acrylate (sodium salt of Acryisäure, aCaH ^), wherein the ratio of the two monomers can vary. In addition, a so-called Kernvernet zer (core cross-linker, CXL) of the monomer solution is added, which connects the formed long-chain polymer molecules in places with each other by chemical bridges (they "crosslinked"). These bridges make the polymer water insoluble. When water or aqueous salt solutions penetrate into the polymer particles, it swells up and tightens this network at the molecular level so that the water can no longer escape without assistance.

The superabsorbent polymers can be present in the wound care article according to the invention in the form of a granulate, a powder, a bed, a compact, a foam, in the form of fibers, a fiber knitted fabric, nonwoven fabric and / or a fiber wadding.

The wound care article may preferably comprise a substantially flat absorbent body of absorbent material consisting of an absorbent web having superabsorbent polymers dispersed therein. These may be in the form of granules, a powder, a pad, a compact, a foam, in the form of fibers Fasergewirkes, -Laid or -Vlieses and / or a fiber wadding present. In this case, the absorbent body comprises at least one material which is selected from the group comprising a mat, in particular an airlaid of said yarns or fibers of superabsorbent polymers with incorporated superabsorbent

Polymers, and / or a loose filling of superabsorbent polymers, said

Airlaid mat may preferably comprise a substantially flat portion of material

Have absorption material, the z. B. consists of an absorbent fleece of said fibers with superabsorbent polymers distributed therein.

This absorption body may correspond to the absorbent pad, which in one

Wound dressing of the applicant of the present invention is included as they

for example, in WO03094813, WO2007051599 and WOO 152780 is disclosed and is sold under the trade name "sorbion sachet". The disclosure content of the above-mentioned publications is fully attached to the disclosure content of this document.

In another embodiment, the absorbent body can also form a core which - optionally flake-like - fibers or yarns of superabsorbent polymers and superabsorbent polymers in granular form, wherein the granules are glued or welded to the fibers or Ga ne in several heights, and the granules are distributed over my ¹ as 50% of the total height of at least a portion of the core, wherein mixed areas of granules and fibers are present. The proportion by weight of the superabsorbent polymers may preferably be in the range between 10 and 25% by weight. Similar constructions are known from conventional incontinence materials and known as sanitary napkins for their cushioning properties. A shell may be arranged around said core, which is arranged overlapping in regions and which, for example, covers or is part of an adhesive seam.

Similarly, within the envelope, a portion of a hydrophobic and / or

water-repellent or water-impermeable material be provided, the

Durchnässungs- or laundry protection acts. The absorbent body, in another embodiment, may also include at least one flat layer comprising fibers or yarns of superabsorbent polymers to which superabsorbent polymers in granular form are adhered. This results in a preferred embodiment, a structure of the body having at least three layers, wherein two cover layers surrounding a layer having superabsorbent polymers.

There are no mixtures of fibers and superabsorbent polymers in the plane; but only fixed announcements of both materials. The possibly

provided in a plurality of layers can be physically compacted together by rolling, pressing, calendering or similar Verfaluen in a preferred embodiment. Moreover, the body may have repetitive patterns or grains, such as a checked pattern, a punching pattern, or the like.

The term "incision" as used herein refers to an incision in the

Absorbent body in which no material was removed. The term "punching" as used herein refers to an incision in the absorbent body in which material has been removed,

Incisions are preferred cuts in the context of the present invention

Material without the material was substantially removed. Said incisions may be slotted or angular (L-shaped), but also cross-shaped or star-shaped. Further preferred forms of the said incisions are shown in FIG. 1 b.

Punches in the context of the present invention are characterized by a substantial removal of material and are preferably circular ("punched holes"), diamond-shaped, or polygonal. Of course, combinations of incisions and punches in a wound care article are also conceivable.

Both the incisions and the punches are preferably designed such that they penetrate the absorption body through all the layers. Alternatively, it can also be provided that they penetrate only a few layers of the absorption body.

It is important that the shape of the incisions and / or punches, or their depth, can be specified by the relevant punching or incision tool.

It is preferably provided that the incisions and / or punches are designed and / or arranged in such a way that they increase the softness, the conformability and / or the wearing comfort of the wound care article. Likewise, it is preferably provided that the incisions and / or punches are formed and / or arranged in such a way that they facilitate the liquid entry into the wound care article. This can be especially true then be advantageous if the absorption body is laminated with a Deckschickt which should provide for a dry surface of the absorption body. Under certain circumstances, this covering layer may hinder the liquid entry into the absorption body. By providing incisions and / or punches according to the invention, this is counteracted,

Further, in some circumstances, superabsorbent particles may leak from the incisions and / or punches and provide rewet of the wound. This can be particularly advantageous when the absorption body is laminated with the already discussed Deckschickt, which is to provide a dry surface of the absorption body. Under certain circumstances, local drying processes in the wound may occur, which are remedied by the said release of superabsorbent particles.

Furthermore, it is preferably provided that the incisions and / or punches are formed and / or arranged in such a way that they define fold lines, along which the

Wound care article can be folded.

Furthermore, a kind of "inner expansion space" is created by the punches, which is available for an increase in volume of the absorbent material as a result of liquid Aufnaiime the latter so called.

In a preferred embodiment it is provided that the wound care article has an at least partially liquid-permeable shell. The latter surrounds the absorbent body, forms a barrier against solid precipitates and allows the passage of other leaked substances to the inside of the shell

arranged absorption body. The sheath is preferably at least partially closed by a seam. This may be e.g. to act an adhesive seam, a stitched seam or a weld, for example, an ultrasonic weld.

In a further preferred embodiment, it is provided that the planar

Absorption body in plan view of its flat side has a surface (Fl), which in Unwetted state is 3% to 75% smaller than the area (F2) of the flattened shell.

In this way, the wound care article forms an expansion space, which ensures that the absorption body can increase in volume during fluid intake and is not restricted by the sheath.

Particular preference is provided that the shell in plan view of his

Flat side has a circumferential, protruding over the seam top and the absorption body is free of hard, sharp edges and corners. Particularly preferably, the corners of the shell - in plan view - strongly rounded.

The pores or meshes of the shell are preferably designed such that they are smaller than the superabsorbent particles. This is particularly important because through the incisions or punches Superabsorberpartikel can trickle out of the absorption body and therefore must be retained by the shell.

Although the size of the superabsorbent particles is subject to certain stochastic fluctuations, it may be provided that the pores or meshes of the shell are preferably smaller than the mean diameter of said superabsorbent particles, more preferably smaller than the mean diameter of the single or multiple standard deviation of said superabsorbent particles.

Preferably, the pores may be e.g. 0.05 mm to 1, 0 mm, preferably 0.20 mm to 0.50 mm large. Furthermore, it can preferably be provided that the pores or meshes are delimited by the filament or fiber sections, which are approximately arcuate in section through the envelope and point with their bow Scheitehi outward.

In a further preferred embodiment it is provided that the absorption body is fixed in the shell. Alternatively, however, it can also be arranged freely movable in the shell be.

Particularly preferably, it is provided that the absorption body in the wound care article according to the invention has a grammage or a basis weight of> 100 g / m and <600 g / m, more preferably from> 125 g / m ² to <500 g / m ² and in particular preferably from> 160 g / m ² to <220 g / m ² . It is further preferred that the wound care article according to the invention has a width of between 20 and up to and including 140 cm and a length of between 30 and 250 cm inclusive. Particularly preferred dimensions are 7.5 x 7.5 cm, 10 x 10 cm, 10 x 20 cm and 20 x 20 cm.

In a further preferred embodiment, it is provided that the absorption body has a proportion of> 40% by weight of superabsorbent polymers. Particularly preferably, the weight fraction of the superabsorbent polymers is> 45, 50, 55, 60, 65 or 70% by weight. Wound care article with such high proportions by weight

superabsorbent polymers have a particularly high absorption capacity for

Fluids af and can replace, for example, on the market vacuum wound care systems.

The envelope is preferably formed from woven or non-woven composite synthetic fibers, such as polypropylene or polyethylene fibers, but also cotton, silk or viscose. The sheath preferably consists of one of a woven or nonwoven material which has at least a surface-specific weight of 20 g / m ² .

Preferably, the shell is made of hydrophobic material, or the shell material is hydrophobic equipped. The hydrophobic properties of the sheath prevent it from sticking to the wound surface and help the wound exudate particles to enter the sheath more quickly.

In a further preferred embodiment, it is provided that the shell has an elastic material at least in sections. This may be, for example, fibers Lycra or spandex act. Also, it is ensured that the Matena labschnitt in Flüssigkeitsau decrease in its volume can increase and is not limited by the shell. In this case, the expansion space described above may be dispensed with.

Wound dressings of the type mentioned are described for example in WO03094813, the

WO2007051599 and WO0152780 of the assignee of the present invention. The disclosure of the said writings is fully attached to the disclosure of this document.

The material of the sheath may be structured such that the sheath has a rough inner surface and a smooth outer surface. Preferably, the rough inner surface of the shell is formed by funnel-shaped perforations which each taper in the direction of the inner surface and terminate in a free opening edge ("projection".) This rough inner surface counteracts the displacements of the contents of the shell, so that a fixation with

Glue points can be dispensed with. Accordingly, the smooth outer surface of the shell material may be curved, extending between the perforations

Be formed material sections. Such a sleeve material, in contrast to a two-sided plane, can be called "three-dimensional", and is known from z, B

DE102006017194 the applicant of the present application, on whose

Revelation content is fully referenced here.

Particularly preferably, it is provided that said three-dimensional Hülienmaterial is aufiaminiert on the aforementioned polypropylene nonwoven. Such a design results in improved fluid absorption properties.

It can also be provided that the wound care article has a liquid-impermeable backsheet on its side facing away from the sore.Furthermore, it can be provided that the sheath on the wound-facing side is provided with a backsheet

physiologically acceptable adhesive (for example a hydrocolloid adhesive). In a further preferred embodiment, it is provided that the wound care article comprises silver, silver ions or silver-containing compounds. A wound care article containing silver and superabsorbent polymers is described for example in EP1656914, which also describes the advantages resulting from the interplay of the two components. This interaction is further enhanced in the context of the subject invention, since the higher conformability ensures better contact with the wound and therefore the silver, the silver ions or the silver-containing compounds can better develop its effect in the wound. Furthermore, the increased liquid entry causes the silver, the silver ions or the silver-containing compounds to mobilize more quickly, so that it can more easily enter the wound. Furthermore, the foldability makes it easier to use, even in deep cavities or fistulas, which are particularly susceptible to inflammation and therefore particularly benefit from treatment with silver, silver ions or silver-containing compounds.

In a further preferred embodiment, it is provided that the wound care article has a preparation comprising bacteriophages or their constituents. One

Wound care articles containing bacteriophages or their components as well

Superabsorbent polymers are described, for example, in WO2009060097, which also describes the advantages resulting from the interplay of the two components.

This interaction is further enhanced in the context of the subject matter of the present invention, as the higher conformability ensures better contact with the wound and therefore the bacteriophages or their constituents can better develop their effect in the wound. Furthermore, the bacteriophages or their components are mobilized faster due to the increased liquid entry, so that it can easily get into the wound. Foldability is also a use in deep cavities or fistula, which are particularly susceptible to inflammation and therefore by a

Treatment with bacteriophages or their components particularly benefit, relieved.

Furthermore, the use of a wound care article according to one of the preceding claims provided as a tamponade, for the treatment of fistulas, and / or for the treatment of wound cavities, For this purpose, on the one hand, the high conformability and / or foldability and on the other hand, the improved fluid intake particularly advantageous.

Furthermore, the use of a wound care article according to one of the preceding claims in a vacuum wound care system is provided. Such vacuum wound care systems are described, for example, in the published patent applications WO2006048240, WO2006048246 and WO2006056294, which also describes the advantages resulting from the interplay of vacuum wound care and superabsorbent polymers. This collaboration is in the context of the

Subject matter of the present invention even stronger, since by the higher

Conformability, better contact with the wound is ensured and the superabsorbent polymers can better fulfill their trapping function.

In a further preferred embodiment of the wound care article according to the invention, at least one lining layer, preferably made of cellulose fleece, is arranged between the absorption body and the envelope. The liner layer serves to guide the wound exudate received through the sheath to the absorbent body while preventing backflow of wound exudate into the wound. The lamination layer is preferably adapted to the inner dimension of the hillie and accordingly in the area slightly larger than the underlying absorption body, so that leaks from the

Absorbent body can be intercepted. Preferably, the lining layer is exactly adapted to the expansion space around the absorbent body. The absorbent body may be flanked by a liner only from one side, or covered with one or more liner layers by a sandwich arrangement from both sides. The lamination layer is preferably made of cellulose fleece without further

Superabsorbent components. However, laminating layers with superabsorbers are also possible. pictures

The present invention is further illustrated by the figures shown and discussed below. It should be understood that the figures are merely descriptive and are not intended to limit the invention in any way.

FIG. 1a shows a wound care article 10 in plan view, comprising an envelope 11 having a seam 12, and a planar absorption body 13 made of a nonwoven or airlaid material containing superabsorbent polymers. The shell forms an expansion space 14, so that it is ensured that the absorption body can increase in fluid intake in its volume and is not limited by the shell. The plane

Absorption body 13 has a pattern of L-shaped incisions 15, which are introduced by means of a suitably designed punching tool in the absorption body and in particular increase the conformability of the originally relatively rigid absorption body. In this way, a wound care article is achieved, which gently to the

The wound relief clings to the patient, which is perceived by the patient as being very soft and agreeable and which, due to the close contact with the wound, can fully unfold its function of absorbing wound exudate.

FIG. 1b shows, by way of example, other shapes which can assume said incisions, FIG.

In all cases of Fig. 1, these incisions facilitate fluid entry into the

Absorbent body and thus accelerate the exudate absorption. Due to the

specific form of the incisions, the material in this area can swell locally, so that a whereabouts of the ingested liquid is ensured in place, and no lateral distribution takes place.

Furthermore, in some circumstances, superabsorbent particles may escape and rewet the wound. This can be advantageous in particular when the absorption body is laminated with a cover which is intended to provide a dry surface of the absorption body. Here it may be too local Drying processes in the wound come through the said leakage of

Superabsorbent particles are corrected.

Fig. 2a shows a further wound flegeartikel 20 in plan view, comprising a shell 21 and a two-dimensional Absorptionsköiper 23 of a nonwoven or airlaid material containing superabsorbent polymers. The two-dimensional Absorptionsköiper 23 has a line-shaped pattern of punches 25 which are introduced by means of a suitably designed punching tool in the Absorptionsköiper. In this way, a fold line is given, along which the wound care article can be folded, for example, to insert it into a deeply incised wound. Furthermore, the punctures, which come to rest particularly on the wound base, the liquid entry into the

Relieves wound care articles and thus improves the active absorption of exudate. Fig. 2b shows said wound care article 20 in a folded position in a deeply incised wound.

FIG. 3 a shows a further wound care article 30 in plan view, comprising an envelope 31 and a planar absorption hood 33 made of a nonwoven or airlaid material containing superabsorbent polymers. The two-dimensional absorption body 33 has three linear patterns of punches 35, which are introduced into the absorption heads by means of a correspondingly designed punching tool. In this way, three fold lines are given, along which the wound care article can be folded, for example in order to adapt it to the relief of a wound. Fei ner is facilitated by the punches, which come especially at the wound base to lie, the fluid entry into the wound care article, thus improving the active absorption of exudate. Fig. 3b shows said wound care article 30 in a folded position adapted to the relief of a wound.

FIG. 4 shows a further wound care article 40 in plan view, comprising a casing 41 and a planar absorption core 43 made of a nonwoven or airlaid material containing superabsorbent polymers. The two-dimensional Absorptionsköiper 43 has a flat pattern of punched holes 45, which by means of a suitably designed punching in the Absoiptionskörper are introduced. In this way the liquid entry into the wound care article is facilitated. Furthermore, the conformability of the originally relatively rigid absorbent body is increased, so that a wound care article is achieved, which gently conforms to the wound relief, the patient will feel very soft and pleasant and can fully unfold its wound exudate-absorbing function by the close contact with the wound.

Fig. 5 shows further embodiments of the wound care article according to the invention, wherein the punches and / or incisions, which are partly realized together in a wound care article, the softness increase the conformability and / or comfort of the wound care article, facilitate the liquid ins tt in the wound care article and / or Define folding lines, along which the wound care article can be folded.

6 shows how from the incisions (FIG. 6 a) and / or punches (FIG. 6 b)

Superabsorbent particles emerge and can ensure rewet the wound. This can be particularly advantageous if the Absoiptionskörper is laminated with a Deckschickt that should provide for a dry surface of the absorption body. Here, it may possibly come to local drying processes in the wound, which are remedied by the said leakage of superabsorbent particles, in some cases, due to the specific shape of the incisions (Figure 6a), the material in this area swell locally, so that a whereabouts the ingested liquid is ensured in place, and no lateral distribution takes place.

Claims

Patentaasprüchc

A wound care article comprising a sheetlike absorbent body of a nonwoven or airlaid material containing superabsorbent polymers, said sheetlike absorbent body having a pattern of incisions and / or punches.

2. A wound care article according to claim 1, characterized in that the incisions and / or punches are formed and / or arranged in such a way that they increase the softness, the conformability and / or the wearing comfort of the wound care article.

3. Wound care article according to one of the preceding claims, characterized in that the incisions and / or punches are formed and / or arranged in such a way that they facilitate the liquid entry into the wound care article.

4. Wound care article according to one of the preceding claims, characterized in that the incisions and / or punches are formed and / or arranged in such a way that they define folding lines, along which the wound care article can be folded.

5. Wound care article according to one of the preceding claims, characterized in that it comprises an at least partially liquid-permeable shell.

6. Wound care article] according to one of the preceding claims, characterized in that the flat absorption body in plan view of its flat side has a surface (Fl), which in the non-wetted state by 3% to 75% smaller than the surface (F2) of the flattened shell is.

7. Wound care article according to one of the preceding claims, characterized in that the absorption body is fixed in the shell.

Wound care article according to one of the preceding claims, characterized in that the absorbent body has a proportion of> 40 wt .-% of superabsorbent polymers.

Wound care article according to one of the preceding claims, characterized in that the sheath comprises, at least in sections, an elastic material.

]. 0. Wound care article according to one of the preceding claims, characterized in that the wound care article comprises silver, silver ions or silver-containing compounds.

1 1. Wound care article according to one of the preceding claims, characterized in that the wound care article has a preparation comprising bacteriophages or their components.

12. Use of a wound care article according to one of the preceding Ansp

Tamponade, for the treatment of fistulas, and / or for the treatment of

Wound cavities.

13. Use of a wound care article according to one of the preceding claims in a vacuum wound care system.